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lisov135 [29]
3 years ago
15

!!!! Which of the following is a step in evaluating: ∫ cos2 5x dx

Mathematics
1 answer:
elena55 [62]3 years ago
8 0
It follows from the double angle identity for cosine:

\cos^2(5x)=\dfrac{1+\cos2(5x)}2=\dfrac{1+\cos(10x)}2
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What is the are of this parallelogram h=5in b=6in
IgorLugansk [536]
<h2>Answer:</h2><h2>The area of the parallelogram is 30 in</h2>

<h2>Step-by-step explanation:</h2>

The reason the area is 30 in is because the formula to find the area of a parallelogram is bxh, so in this case, you would multiply 6x5 to get your answer of 30.

8 0
3 years ago
Use Descartes rule to determine the possible number of positive and negative solutions for the polynomial: f(x)=10x^4-21x^2+11​
galina1969 [7]

Answer:

x = 11/2

Step-by-step explanation:

just go by each step

3 0
2 years ago
Sierra is getting her car fixed at a mechanics. The total cost after tax is represented by 0.065(30h) + 30h, where h represents
grandymaker [24]

Given :

Sierra is getting her car fixed at a mechanics. The total cost after tax is represented by 0.065(30h) + 30h, where h represents the number of hours it takes to repair the car.

To Find :

What part of the expression represents the amount of money she will have to pay in tax.

Solution :

Total cost , T = 30h( 1 + 0.065)

T = 30h + 30h(0.065)

T = (30h) + (30h )× 6.5 %

Here, 30h is the cost of repairing the car.

Other part shows the tax she have to pay which is 6.5% of the total amount.

Hence, this is the required solution.

4 0
3 years ago
HELP me pls....................
maw [93]

Answer:

7x+21

Step-by-step explanation:

hope this helps! :)

6 0
3 years ago
Read 2 more answers
Find the distance between the points (8, – 7) and ( – 4,9). Hint: Use the Pythagorean theorem
Sedaia [141]
8+4=12
9+7=16
12^2=144
16^2=256
144+256=400
square root of 400 is 20

therefore the distance from (8, -7) to (-4,9) is 20.
6 0
3 years ago
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